forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
197 lines
4.5 KiB
197 lines
4.5 KiB
/* |
|
* Copyright (c) 2017 Redpine Signals Inc. |
|
* |
|
* Permission to use, copy, modify, and/or distribute this software for any |
|
* purpose with or without fee is hereby granted, provided that the above |
|
* copyright notice and this permission notice appear in all copies. |
|
* |
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
|
*/ |
|
#include <linux/module.h> |
|
#include <linux/kernel.h> |
|
#include <net/bluetooth/bluetooth.h> |
|
#include <net/bluetooth/hci_core.h> |
|
#include <asm/unaligned.h> |
|
#include <net/rsi_91x.h> |
|
#include <net/genetlink.h> |
|
|
|
#define RSI_DMA_ALIGN 8 |
|
#define RSI_FRAME_DESC_SIZE 16 |
|
#define RSI_HEADROOM_FOR_BT_HAL (RSI_FRAME_DESC_SIZE + RSI_DMA_ALIGN) |
|
|
|
struct rsi_hci_adapter { |
|
void *priv; |
|
struct rsi_proto_ops *proto_ops; |
|
struct hci_dev *hdev; |
|
}; |
|
|
|
static int rsi_hci_open(struct hci_dev *hdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static int rsi_hci_close(struct hci_dev *hdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static int rsi_hci_flush(struct hci_dev *hdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static int rsi_hci_send_pkt(struct hci_dev *hdev, struct sk_buff *skb) |
|
{ |
|
struct rsi_hci_adapter *h_adapter = hci_get_drvdata(hdev); |
|
struct sk_buff *new_skb = NULL; |
|
|
|
switch (hci_skb_pkt_type(skb)) { |
|
case HCI_COMMAND_PKT: |
|
hdev->stat.cmd_tx++; |
|
break; |
|
case HCI_ACLDATA_PKT: |
|
hdev->stat.acl_tx++; |
|
break; |
|
case HCI_SCODATA_PKT: |
|
hdev->stat.sco_tx++; |
|
break; |
|
} |
|
|
|
if (skb_headroom(skb) < RSI_HEADROOM_FOR_BT_HAL) { |
|
/* Insufficient skb headroom - allocate a new skb */ |
|
new_skb = skb_realloc_headroom(skb, RSI_HEADROOM_FOR_BT_HAL); |
|
if (unlikely(!new_skb)) |
|
return -ENOMEM; |
|
bt_cb(new_skb)->pkt_type = hci_skb_pkt_type(skb); |
|
kfree_skb(skb); |
|
skb = new_skb; |
|
if (!IS_ALIGNED((unsigned long)skb->data, RSI_DMA_ALIGN)) { |
|
u8 *skb_data = skb->data; |
|
int skb_len = skb->len; |
|
|
|
skb_push(skb, RSI_DMA_ALIGN); |
|
skb_pull(skb, PTR_ALIGN(skb->data, |
|
RSI_DMA_ALIGN) - skb->data); |
|
memmove(skb->data, skb_data, skb_len); |
|
skb_trim(skb, skb_len); |
|
} |
|
} |
|
|
|
return h_adapter->proto_ops->coex_send_pkt(h_adapter->priv, skb, |
|
RSI_BT_Q); |
|
} |
|
|
|
static int rsi_hci_recv_pkt(void *priv, const u8 *pkt) |
|
{ |
|
struct rsi_hci_adapter *h_adapter = priv; |
|
struct hci_dev *hdev = h_adapter->hdev; |
|
struct sk_buff *skb; |
|
int pkt_len = get_unaligned_le16(pkt) & 0x0fff; |
|
|
|
skb = dev_alloc_skb(pkt_len); |
|
if (!skb) |
|
return -ENOMEM; |
|
|
|
memcpy(skb->data, pkt + RSI_FRAME_DESC_SIZE, pkt_len); |
|
skb_put(skb, pkt_len); |
|
h_adapter->hdev->stat.byte_rx += skb->len; |
|
|
|
hci_skb_pkt_type(skb) = pkt[14]; |
|
|
|
return hci_recv_frame(hdev, skb); |
|
} |
|
|
|
static int rsi_hci_attach(void *priv, struct rsi_proto_ops *ops) |
|
{ |
|
struct rsi_hci_adapter *h_adapter = NULL; |
|
struct hci_dev *hdev; |
|
int err = 0; |
|
|
|
h_adapter = kzalloc(sizeof(*h_adapter), GFP_KERNEL); |
|
if (!h_adapter) |
|
return -ENOMEM; |
|
|
|
h_adapter->priv = priv; |
|
ops->set_bt_context(priv, h_adapter); |
|
h_adapter->proto_ops = ops; |
|
|
|
hdev = hci_alloc_dev(); |
|
if (!hdev) { |
|
BT_ERR("Failed to alloc HCI device"); |
|
goto err; |
|
} |
|
|
|
h_adapter->hdev = hdev; |
|
|
|
if (ops->get_host_intf(priv) == RSI_HOST_INTF_SDIO) |
|
hdev->bus = HCI_SDIO; |
|
else |
|
hdev->bus = HCI_USB; |
|
|
|
hci_set_drvdata(hdev, h_adapter); |
|
hdev->dev_type = HCI_PRIMARY; |
|
hdev->open = rsi_hci_open; |
|
hdev->close = rsi_hci_close; |
|
hdev->flush = rsi_hci_flush; |
|
hdev->send = rsi_hci_send_pkt; |
|
|
|
err = hci_register_dev(hdev); |
|
if (err < 0) { |
|
BT_ERR("HCI registration failed with errcode %d", err); |
|
hci_free_dev(hdev); |
|
goto err; |
|
} |
|
|
|
return 0; |
|
err: |
|
h_adapter->hdev = NULL; |
|
kfree(h_adapter); |
|
return -EINVAL; |
|
} |
|
|
|
static void rsi_hci_detach(void *priv) |
|
{ |
|
struct rsi_hci_adapter *h_adapter = priv; |
|
struct hci_dev *hdev; |
|
|
|
if (!h_adapter) |
|
return; |
|
|
|
hdev = h_adapter->hdev; |
|
if (hdev) { |
|
hci_unregister_dev(hdev); |
|
hci_free_dev(hdev); |
|
h_adapter->hdev = NULL; |
|
} |
|
|
|
kfree(h_adapter); |
|
} |
|
|
|
const struct rsi_mod_ops rsi_bt_ops = { |
|
.attach = rsi_hci_attach, |
|
.detach = rsi_hci_detach, |
|
.recv_pkt = rsi_hci_recv_pkt, |
|
}; |
|
EXPORT_SYMBOL(rsi_bt_ops); |
|
|
|
static int rsi_91x_bt_module_init(void) |
|
{ |
|
return 0; |
|
} |
|
|
|
static void rsi_91x_bt_module_exit(void) |
|
{ |
|
return; |
|
} |
|
|
|
module_init(rsi_91x_bt_module_init); |
|
module_exit(rsi_91x_bt_module_exit); |
|
MODULE_AUTHOR("Redpine Signals Inc"); |
|
MODULE_DESCRIPTION("RSI BT driver"); |
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
|